package com;

import org.apache.log4j.Logger;
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.hssf.util.HSSFColor;

import java.io.*;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.text.SimpleDateFormat;
import java.util.Collection;
import java.util.Date;
import java.util.Iterator;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class ExportExcel<T> {
    private static final Logger logger = Logger.getLogger(ExportExcel.class);

    public void exportExcel(String title, Collection<T> dataset,
                            String[] headers, OutputStream out) {
        exportExcel(title, headers, dataset, out, "yyyy-MM-dd");
    }

    /**
     * 导出Excel文件
     *
     * @param title
     * @param dataset
     * @param headers
     * @param excelFile
     * @throws IOException
     * @throws InvocationTargetException
     * @throws IllegalAccessException
     * @throws NoSuchMethodException
     * @throws IllegalArgumentException
     * @throws SecurityException
     */
    public void exportExcel(String title, Collection<T> dataset,
                            String[] headers, String excelFile) throws IOException,
            SecurityException, IllegalArgumentException, NoSuchMethodException,
            IllegalAccessException, InvocationTargetException {
        exportExcel(title, headers, dataset, excelFile, "yyyy-MM-dd");
    }

    /**
     *
     * @param title
     *            表格标题
     *
     * @param headers
     *            表格属性列名数组
     * @param dataset
     *            javabean数据集合
     * @param out
     *            流对象
     * @param pattern
     *            时间格式
     */
    public void exportExcel(String title, String[] headers,
                            Collection<T> dataset, OutputStream out, String pattern) {
        // 声明一个工作薄
        HSSFWorkbook workbook = new HSSFWorkbook();
        // 生成一个表格
        HSSFSheet sheet = workbook.createSheet(title);
        // 设置表格默认列宽度为15个字节
        sheet.setDefaultColumnWidth((short) 15);
        // 生成一个样式
        HSSFCellStyle style = workbook.createCellStyle();
        // 设置这些样式
        style.setFillForegroundColor(HSSFColor.SKY_BLUE.index);
        style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
        style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
        style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
        style.setBorderRight(HSSFCellStyle.BORDER_THIN);
        style.setBorderTop(HSSFCellStyle.BORDER_THIN);
        style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
        // 生成一个字体
        HSSFFont font = workbook.createFont();
        font.setColor(HSSFColor.VIOLET.index);
        font.setFontHeightInPoints((short) 12);
        font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
        // 把字体应用到当前的样式
        style.setFont(font);
        // 生成并设置另一个样式
        HSSFCellStyle style2 = workbook.createCellStyle();
        style2.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);
        style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
        style2.setBorderBottom(HSSFCellStyle.BORDER_THIN);
        style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);
        style2.setBorderRight(HSSFCellStyle.BORDER_THIN);
        style2.setBorderTop(HSSFCellStyle.BORDER_THIN);
        style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);
        style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
        // 生成另一个字体
        HSSFFont font2 = workbook.createFont();
        font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
        // 把字体应用到当前的样式
        style2.setFont(font2);

        // 声明一个画图的顶级管理器
        HSSFPatriarch patriarch = sheet.createDrawingPatriarch();
        // 定义注释的大小和位置,详见文档
        HSSFComment comment = patriarch.createComment(new HSSFClientAnchor(0,
                0, 0, 0, (short) 4, 2, (short) 6, 5));
        // 设置注释内容
        comment.setString(new HSSFRichTextString("相关信息！"));
        // 设置注释作者，当鼠标移动到单元格上是可以在状态栏中看到该内容.
        comment.setAuthor("..");

        // 产生表格标题行
        HSSFRow row = sheet.createRow(0);
        for (short i = 0; i < headers.length; i++) {
            HSSFCell cell = row.createCell(i);
            cell.setCellStyle(style);
            HSSFRichTextString text = new HSSFRichTextString(headers[i]);
            cell.setCellValue(text);
        }

        Iterator<T> it = dataset.iterator();
        int index = 0;

        while (it.hasNext()) {
            index++;
            row = sheet.createRow(index);
            T t = (T) it.next();
            // 利用反射，根据javabean属性的先后顺序，动态调用getXxx()方法得到属性值
            Field[] fields = t.getClass().getDeclaredFields();
            for (short i = 0; i < fields.length; i++) {
                HSSFCell cell = row.createCell(i);
                cell.setCellStyle(style2);
                Field field = fields[i];
                String fieldName = field.getName();
                String getMethodName = "get"
                        + fieldName.substring(0, 1).toUpperCase()
                        + fieldName.substring(1);
                try {
                    Class tCls = t.getClass();
                    Method getMethod = tCls.getMethod(getMethodName,
                            new Class[] {});
                    Object value = getMethod.invoke(t, new Object[] {});
                    // 判断值的类型后进行强制类型转换
                    String textValue = null;
                    // if (value instanceof Integer) {
                    // int intValue = (Integer) value;
                    // cell.setCellValue(intValue);
                    // } else if (value instanceof Float) {
                    // float fValue = (Float) value;
                    // textValue = new HSSFRichTextString(
                    // String.valueOf(fValue));
                    // cell.setCellValue(textValue);
                    // } else if (value instanceof Double) {
                    // double dValue = (Double) value;
                    // textValue = new HSSFRichTextString(
                    // String.valueOf(dValue));
                    // cell.setCellValue(textValue);
                    // } else if (value instanceof Long) {
                    // long longValue = (Long) value;
                    // cell.setCellValue(longValue);
                    // }
                    if (value instanceof Boolean) {
                        boolean bValue = (Boolean) value;
                        textValue = "男";
                        if (!bValue) {
                            textValue = "女";
                        }
                    } else if (value instanceof Date) {
                        Date date = (Date) value;
                        SimpleDateFormat sdf = new SimpleDateFormat(pattern);
                        textValue = sdf.format(date);
                    } else if (value instanceof byte[]) {
                        // 有图片时，设置行高为60px;
                        row.setHeightInPoints(60);
                        // 设置图片所在列宽度为80px,注意这里单位的一个换算
                        sheet.setColumnWidth(i, (short) (35.7 * 80));
                        // sheet.autoSizeColumn(i);
                        byte[] bsValue = (byte[]) value;
                        HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0,
                                1023, 255, (short) 6, index, (short) 6, index);
                        anchor.setAnchorType(2);
                        patriarch.createPicture(anchor, workbook.addPicture(
                                bsValue, HSSFWorkbook.PICTURE_TYPE_JPEG));
                    } else {
                        // 其它数据类型都当作字符串简单处理
                        if (value != null) {

                            textValue = value.toString();
                        }
                    }
                    // 如果不是图片数据，就利用正则表达式判断textValue是否全部由数字组成
                    if (textValue != null) {
                        Pattern p = Pattern.compile("^//d+(//.//d+)?$");
                        Matcher matcher = p.matcher(textValue);
                        if (matcher.matches()) {
                            // 是数字当作double处理
                            cell.setCellValue(Double.parseDouble(textValue));
                        } else {
                            HSSFRichTextString richString = new HSSFRichTextString(
                                    textValue);
                            HSSFFont font3 = workbook.createFont();
                            font3.setColor(HSSFColor.BLUE.index);
                            richString.applyFont(font3);
                            cell.setCellValue(richString);
                        }
                    }
                } catch (SecurityException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (NoSuchMethodException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IllegalArgumentException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IllegalAccessException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (InvocationTargetException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } finally {
                    // 清理资源
                }
            }

        }
        try {
            workbook.write(out);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

    public void exportExcelByArray(String title, String[] headers,
                                   Collection<T> dataset, OutputStream out, String pattern) throws Exception {

        try {
            // 声明一个工作薄
            HSSFWorkbook workbook = new HSSFWorkbook();
            // 生成一个表格
            HSSFSheet sheet = workbook.createSheet(title);
            // 设置表格默认列宽度为15个字节
            // sheet.setDefaultColumnWidth((short) 15);
            // // 生成一个样式
            HSSFCellStyle style = workbook.createCellStyle();
            // 设置这些样式
            style.setFillForegroundColor(HSSFColor.SKY_BLUE.index);
            style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
            style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
            style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
            style.setBorderRight(HSSFCellStyle.BORDER_THIN);
            style.setBorderTop(HSSFCellStyle.BORDER_THIN);
            style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
            // 生成一个字体
            HSSFFont font = workbook.createFont();
            font.setColor(HSSFColor.VIOLET.index);
            font.setFontHeightInPoints((short) 12);
            font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
            // 把字体应用到当前的样式
            style.setFont(font);
            // 生成并设置另一个样式
            HSSFCellStyle style2 = null;// workbook.createCellStyle();
            HSSFPatriarch patriarch = null;// sheet.createDrawingPatriarch();

            // 产生表格标题行
            this.createTitleRow(sheet, style, headers);

            Iterator<T> it = dataset.iterator();
            int index = 0;
            int sheetIdx = 0;
            while (it.hasNext()) {
                index++;
                if (index % 65000 == 0) {
                    sheetIdx++;
                    sheet = workbook.createSheet(title + sheetIdx);
                    this.createTitleRow(sheet, style, headers);
                    index = 1;
                }
                this.createContentRow(index, sheet, it, style2, patriarch,
                        workbook, pattern);
            }
            // 生成Excel文件
            workbook.write(out);
        } catch (IOException e) {
            throw e;
        }

    }



    private HSSFWorkbook getHSSFWorkbook(String  workbook) throws IOException{
        File file = new File(workbook);
        boolean bool = file.exists();
        if(bool){
            FileInputStream is = new FileInputStream(file);
            return new HSSFWorkbook(is);
        }
        return new HSSFWorkbook();
    }



    /**
     *
     * @param title
     *            表格标题
     *
     * @param headers
     *            表格属性列名数组
     * @param dataset
     *            javabean数据集合
     * @param excelFile
     *            Excel文件
     * @param pattern
     *            时间格式
     * @throws IOException
     * @throws InvocationTargetException
     * @throws IllegalAccessException
     * @throws NoSuchMethodException
     * @throws IllegalArgumentException
     * @throws SecurityException
     */
    public void exportExcel(String title, String[] headers,
                            Collection<T> dataset, String excelFile, String pattern)
            throws IOException, SecurityException, IllegalArgumentException,
            NoSuchMethodException, IllegalAccessException,
            InvocationTargetException {
        logger.debug("exportExcel() start");
        FileOutputStream fout = null;
        try {
            // 声明一个工作薄
            HSSFWorkbook workbook = this.getHSSFWorkbook(excelFile);
            // 生成一个表格
            HSSFSheet sheet = workbook.createSheet(title);
            // 设置表格默认列宽度为15个字节
            // sheet.setDefaultColumnWidth((short) 15);
            // // 生成一个样式
            HSSFCellStyle style = workbook.createCellStyle();
            // 设置这些样式
            style.setFillForegroundColor(HSSFColor.SKY_BLUE.index);
            style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
            style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
            style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
            style.setBorderRight(HSSFCellStyle.BORDER_THIN);
            style.setBorderTop(HSSFCellStyle.BORDER_THIN);
            style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
            // 生成一个字体
            HSSFFont font = workbook.createFont();
            font.setColor(HSSFColor.VIOLET.index);
            font.setFontHeightInPoints((short) 12);
            font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
            // 把字体应用到当前的样式
            style.setFont(font);
            // 生成并设置另一个样式
            HSSFCellStyle style2 = null;// workbook.createCellStyle();
            // style2.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);
            // style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
            // style2.setBorderBottom(HSSFCellStyle.BORDER_THIN);
            // style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);
            // style2.setBorderRight(HSSFCellStyle.BORDER_THIN);
            // style2.setBorderTop(HSSFCellStyle.BORDER_THIN);
            // style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);
            // style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
            // // 生成另一个字体
            // HSSFFont font2 = workbook.createFont();
            // font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
            // // 把字体应用到当前的样式
            // style2.setFont(font2);
            //
            // // 声明一个画图的顶级管理器
            HSSFPatriarch patriarch = null;// sheet.createDrawingPatriarch();
            // // 定义注释的大小和位置,详见文档
            // HSSFComment comment = patriarch.createComment(new
            // HSSFClientAnchor(0,
            // 0, 0, 0, (short) 4, 2, (short) 6, 5));
            // // 设置注释内容
            // comment.setString(new HSSFRichTextString("相关信息！"));
            // // 设置注释作者，当鼠标移动到单元格上是可以在状态栏中看到该内容.
            // comment.setAuthor("zmq");

            logger.debug("exportExcel().writeExcel start");
            // 产生表格标题行
            this.createTitleRow(sheet, style, headers);

            Iterator<T> it = dataset.iterator();
            int index = 0;
            int sheetIdx = 0;
            while (it.hasNext()) {
                index++;
                if (index % 65000 == 0) {
                    sheetIdx++;
                    sheet = workbook.createSheet(title + sheetIdx);
                    this.createTitleRow(sheet, style, headers);
                    index = 1;
                }
                this.createContentRow(index, sheet, it, style2, patriarch,
                        workbook, pattern);
            }
            logger.debug("exportExcel().writeExcel end");
            logger.debug("exportExcel().createExcelFile start");
            // 生成Excel文件
            fout = new FileOutputStream(excelFile);
            workbook.write(fout);
            logger.debug("exportExcel().createExcelFile end");
        } catch (IOException e) {
            // TODO Auto-generated catch block
            logger.error("exportExcel() error:", e);
            throw e;
        } finally {
            if (fout != null) {
                fout.close();
            }
        }
        logger.debug("exportExcel() end");
    }

    /**
     * 填充单元格值
     *
     * @param value
     * @param row
     * @param i
     * @param sheet
     * @param index
     * @param patriarch
     * @param workbook
     * @param pattern
     * @param cell
     */
    private void setCellValue(Object value, HSSFRow row, int i,
                              HSSFSheet sheet, int index, HSSFPatriarch patriarch,
                              HSSFWorkbook workbook, String pattern, HSSFCell cell) {
        String textValue = null;
        HSSFRichTextString richString = null;
        HSSFFont font3 = null;
        if (value instanceof Boolean) {
            boolean bValue = (Boolean) value;
            textValue = "男";
            if (!bValue) {
                textValue = "女";
            }
        } else if (value instanceof Date) {
            Date date = (Date) value;
            SimpleDateFormat sdf = new SimpleDateFormat(pattern);
            textValue = sdf.format(date);
        } else if (value instanceof byte[]) {
            // 有图片时，设置行高为60px;
            row.setHeightInPoints(60);
            // 设置图片所在列宽度为80px,注意这里单位的一个换算
            sheet.setColumnWidth(i, (short) (35.7 * 80));
            // sheet.autoSizeColumn(i);
            // byte[] bsValue = (byte[]) value;
            // HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0, 1023, 255,
            // (short) 6, index, (short) 6, index);
            // anchor.setAnchorType(2);
            // patriarch.createPicture(anchor, workbook.addPicture(bsValue,
            // HSSFWorkbook.PICTURE_TYPE_JPEG));
        } else {
            // 其它数据类型都当作字符串简单处理
            if (value != null) {
                textValue = value.toString();
            }
        }
        // 如果不是图片数据，就利用正则表达式判断textValue是否全部由数字组成
        if (textValue != null) {
            Pattern p = Pattern.compile("^//d+(//.//d+)?$");
            Matcher matcher = p.matcher(textValue);
            if (matcher.matches()) {
                // 是数字当作double处理
                cell.setCellValue(Double.parseDouble(textValue));
            } else {
                richString = new HSSFRichTextString(textValue);
                // if (i == 0)
                // font3 = workbook.createFont();
                // else
                // font3 = workbook.getFontAt((short) 0);
                // font3.setColor(HSSFColor.BLUE.index);
                // richString.applyFont(font3);
                cell.setCellValue(richString);
            }
        }
    }

    /**
     * 生成标题
     *
     * @param sheet
     * @param style
     * @param headers
     */
    private void createTitleRow(HSSFSheet sheet, HSSFCellStyle style,
                                String[] headers) {
        HSSFRow row = sheet.createRow(0);
        int len = headers.length;
        HSSFRichTextString text = null;
        HSSFCell cell = null;
        for (int i = 0; i < len; i++) {
            cell = row.createCell(i);
            cell.setCellStyle(style);
            text = new HSSFRichTextString(headers[i]);
            cell.setCellValue(text);
        }
    }

    /**
     * 生成内容（一行）
     *
     * @param index
     * @param sheet
     * @param it
     * @param style2
     * @param patriarch
     * @param workbook
     * @param pattern
     * @throws NoSuchMethodException
     * @throws SecurityException
     * @throws InvocationTargetException
     * @throws IllegalAccessException
     * @throws IllegalArgumentException
     */
    private void createContentRow(int index, HSSFSheet sheet, Iterator<T> it,
                                  HSSFCellStyle style2, HSSFPatriarch patriarch,
                                  HSSFWorkbook workbook, String pattern) throws SecurityException,
            NoSuchMethodException, IllegalArgumentException,
            IllegalAccessException, InvocationTargetException {
        HSSFRow row = sheet.createRow(index);
        T t = (T) it.next();
        if (t.getClass().isArray()) {
            HSSFCell cell = null;
            Object s = null;
            // 返回数据类型为数组
            Object[] strArray = (Object[]) t;
            int len = strArray.length;
            for (int i = 0; i < len; i++) {
                cell = row.createCell(i);
                // cell.setCellStyle(style2);
                s = strArray[i];
                this.setCellValue(s, row, i, sheet, index, patriarch, workbook,
                        pattern, cell);
            }
        } else {
            // 返回数据类型为其他类型
            HSSFCell cell = null;
            Field field = null;
            Object value = null;
            // 利用反射，根据javabean属性的先后顺序，动态调用getXxx()方法得到属性值
            Field[] fields = t.getClass().getDeclaredFields();
            int len = fields.length;
            for (int i = 0; i < len; i++) {
                cell = row.createCell(i);
                // cell.setCellStyle(style2);
                field = fields[i];
                String fieldName = field.getName();
                String getMethodName = "get"
                        + fieldName.substring(0, 1).toUpperCase()
                        + fieldName.substring(1);
                Class tCls = t.getClass();
                Method getMethod = tCls
                        .getMethod(getMethodName, new Class[] {});
                value = getMethod.invoke(t, new Object[] {});
                // 判断值的类型后进行强制类型转换
                this.setCellValue(value, row, i, sheet, index, patriarch,
                        workbook, pattern, cell);
            }
        }
    }
}
